Lock.



J. H. SHAW.

LOOK. APPLICATION FILED ssprza, 1911A Patented Mar. 10, 1914.

2 SHBETSSHEET 1.

INVEN'TOR. g5

WITNESSES BNJ m A TTORNEYS COLUMBIA PLANOORAPH COHWASNINOT ON. n. c.

J. H. SHAW.

LOOK.

APPLICATION FILED SEPT.23,1911.

1,089,977. Patented Mar. 10, 191* 2 SHEETS-SHEET 2.

XZNESLJZ EV lNVE/gii; W 231 l ltll l PATENT Oltilhltfill.

JOHN H. SHAW, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT & COMPANY, OF NEVJ' HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

Specification of Letters Patent.

Application filed'September 23, 1911.

Patented M a1". 10, 15H 4;.

Serial No. 650.901.

1' b all NY/L07)! it may concern Be it known that I, JOHN ll. Flinn, a citizen ot the United States, residing in the city and county of New lri aven, State of Connecticut, have invented new and usetul Improvements in Locks, of which the tollowing is a full, clear, and exact description, when taken in connection with the accompanying drawings.

Elly invention relates to looks, and its object is to provide an improved and simplified construction of night latch mechanism.

My invention is illustrated in the accompanying drawings, in which,

Figure 1 is a side view in elevation of a lock with the cap plate removed; Fig. 2, a similar view with the dogging slide of the night latch mechanism. in dogging position, showing the door closed, and the releasing thumb stop slide controlling the dogging slide automatically dogged; Fig. 3, a view similar to Fig. 1, with the latch bolt inside hub yoke, dogging member and automatic bolt removed; Fig. 1-, a. View similar to Fig. 3, with both the thumb stop slides protracted; Fig. 5, a detail plan view of the connecting lever between the two slides; Fig. (3, a detail edge view oi the upper thumb stop slide; Fig. 7, a similar view of the autimatic bolt, and Fig. 8, a similar view of the dogging slide.

In all figures, similar letters of reference represent like parts.

Referring to the drawings, 1 is a latch bolt having at the inner end of the shank a head 2, which is adapted to be engaged by a yoke 3. The yoke is actuated by the wings of an outside hub t and an inside hub The outside hub 4t has a notch 6 which is adapted to receive the end of a night latch i'nember or dogging slide 7. the front end of which is provided with a thumb stop 8 projectable through the taco plate 9 of the lock. A spring 10 carried by the slide 7 is adapted to engage the post 11 rising from the casing for the purpose of retaining the slide in protracted or retracted position. 011 its under side the slide is provided with a stud 12. This stud engages an open slot :t'ormed by the forked arms 13 of the lower end of a walking beam or connecting lever l t which is pivoted centrally at 15 to the eas ing. The upper end of the lever is provided with an arm 16 projecting vertically upward. This arm projects behind a stud 'tT extending 't'rom a thumb stop slide .8, whereby whenever the thumb stop slide is pushed inwardly the connecting lever will be pushed back by the same so as to protract the dogging member 7 and thus release the outside lmb. Moreover the dogging slide 7 may be protracted 't'rom dogging position to release the lmb even when the upper actual; ing slide is in protracted position, which latter movement is etlt'ected by reason ot the fact that the stud of the upper slide has a bearing against the connecting lever only on the rear side of the stud and has a forward movement; independent of said connecting lever.

Projecting through the taco plate the head 19 of an automatic false bolt 20, which has a depending vertical arm 21 provided with a tug The lug 22 is adiu ited to engage the lower edge ot a lever 93 which constitutes a dogging member and is adapted to dog the upper slide 18 and the head of the latch bolt. A shoulder it on said lower edge of the doggimr member engages with the lug 2 ot the automatic False bolt 20 so that when said bolt is in its normal protracted position when the door is open. the dogging member will be held out of dogging position relative to the slide and latch bolt. hen the door is closed the bolt 20 will be moved and held inwardly by contact with the striker plate and a spring 2.) connected to the rear arm of the lever 93 will tilt said lever on its pivot so as to carry the front end thereof down into dogging position behind the heads of? the thumb stop slide and the latch bolt. To this end, the :front end of the dogging member is provided with two dogging arms 20 and 27 spaced apart vertically V straddle the head of the slide 18 when the door is in open position. lVhen the door is closed. however. and the bolt is actuated as before described. the upper arm 26 drops behind the head of the slide 18, and the lower arm 27 drops behind a shoulder on the head of the latch bolt. Owing to the one way operative connection of the releasing slide with the lever, the outer manual retracting means for the bolt is prevented from (meration without the necessity of dogging the night latch slide 7.

H a ving now described my invention, what and adapted to.

I claim and desire to secure by Letters Patent, is

1. In a lock, the combination With a hub, of a dogging member therefor, a releasing member for said dogging member, and a Walking beam between said members having a one-Way connection With one of them; substantially as described.

2. In a lock, the combination with a hub, of a dogging slide therefor, a releasing slide for said dogging slide, and a Walking beam connecting said slides and having a one-Way connection with one of them; substantially as described.

3. In a lock, the combination With a hub, of a dogging slide therefor, a releasing slide for said dogging slide, and a Walking beam connecting said slides and having a one-Way connection With said releasing slide; substantially as described.

In a lock, the combination With a hub, of a dogging slide therefor, a releasing slide having a stud, and a connecting lever between said slides having a single arm projecting across the stud of said releasing slide; substantially as described.

In Witness whereof, I have hereunto set my hand on the 20th day of September, 1911.

JQHN H. SHAWL /Vitnesses Josnrn D. SARGENT, BERTHA RAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

